Problem question

21. An Eskimo pulls a sled as shown. The total mass of the sled is 50.0 kg, and he exerts a force of 1.10 10² N on the sled by pulling on the rope.

21. a-How much work does he do on the sled if = 20

and he pulls the sled 5.0 m?

Solution:

21.b-Find the normal force acting the sled. if = 20 as he pulls the sled 5.0 m? (g=10m/s²)

Solution:

22. A 95.0-kg refrigerator rests on the floor. How much work is required to move it at constant speed for 4.00 m along the floor against a friction 180N

:

23. Hamed does 15 Joules of work to push the pencil over 1 meter.How much force did he use? (4 marks)

Solution: